Yes, TIC, is a very difficult structure to finance today, with the separate but combined property ownership portions of the whole.
While I believe this question should be answered by an attorney, it in my own experience, I would suggest an LLC ownership form; or alternatively a S-Corporation.
I assume that you have a current TIC operating (or management agreement). The steps for gaining approval from all the TIC owners, should be covered within that agreement.
Again, the best recommendation I can make is to contact a real estate attorney within your state jurisdiction.
Onward and Upward,
Holder of one of CA's oldest active DRE Licenses
CA DRE 544165
AZ DRE BR 641305000
Feb 20, 2013